Monkey-wrench.



A. KLEIN.

MONKEY WRENCH.

APPLICATION FILED IUNEH, 191s.

Patented Apr. 25, 1916.

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THE COLUMBIA FLANOGRAPH ,co., WASHINGTON, D c.

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ALBERT KLEIN, OF EMSWORTH, PENNSYLVANIA.

MONKEY-WRENCH.

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Application filed Tune 11, 1913.

To all whom it may concern:

Be it known that I, ALBERT KLEIN, a citizen of the United States, and aresident of Emsworth, in the county of Allegheny and State ofPennsylvania, have invented a new an d useful Improvement inMonkeylVrenches; and I do hereby declare the following to be a full,clear, and exact description thereof.

My invention relates to wrenches and has special reference to such aclass as are known as monkey wrenches, for hearing against flat surfacesto turn the same.

The object of my invention is to provide a cheap, simple and efficientform of monkey wrench which can be adjusted to any gage in a secondstime and when so adjusted will be firm and secure andwill not becomeloose until desired by the person using the same.

A further object is to provide a wrench having few parts in order toeliminate the labor of assembling and finishin the same.

My invention consists, general y stated, in the novel arrangement,construction, and combination of parts as hereinafter more specificallyset forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains toconstruct and use my improved monkey wrench, I will describe the samemore fully referring to the accompanying drawing in which Figure 1 is aside elevation of my improved wrench showing part of the same brokenaway. Fig. 2 is a similar view of the same showing the jaws closed andthe locking piece in its open position. Fig. 3 is a top plan view of thewrench with part of the sliding jaw broken away. Fig. i is a top planview of the sliding jaw showing the rack by which the same is locked.Fig. 5 is an end view of the locking piece em ployed. Fig. 6 is a topview of the spring used for engaging with the locking piece.

Like symbols of reference herein indicate like parts in each of thefigures of the drawing.

As illustrated in the drawing my improved wrench has a body member 1which is provided with a fixed jaw 2 at the one end of the same and ahandle portion 3 at its other end. This body member 1 has a pair ofwalls 4 which extend up from the fixed jaw 2 a d are pro ided withcountersunk rder t get the necessary distance between Specification ofLetters Patent.

Patented Apr. 25, 1216.

Serial No. 772,992.

holes 5 at the upper end of the same for the purpose of receiving rivets6, which rivets extend through holes '7 in a fixed pawl 8 which fitsbetween the walls 4 of said body member. The pawl 8 has its lower face 9curved as shown in Fig. 1 and such face terminates at its rear end in atooth 10 as hereinafter described.

Immediately beyond the two walls 4t and at a lower level than the bottomof said walls are a pair of small flanges 11 which define a recess 12wherein is disposed a locking dog 13. This locking dog 13 is adapted tobe held in position in the recess 12 by means of a pin l l extendingthrough the lower end of such locking dog and through holes 15 in eachof the small flanges 11, while the free end of said dog is provided witha lateral operating arm or trunnion 16 at each side of the same as laterexplained. The locking dog 13 is further provided with a small shoulder17 on the outer face of the same for engaging with a flat spring 18secured to the handle portion 3 of said body member. This spring 18 hasa curved end portion 19 for fitting against the shoulder 17 of thelocking dog so that the tendency of such spring is to keep the said dogin an upright position such as shown in Fig. 1 of the drawing.

The sliding jaw 20 has a shank 21 which is slidable between the walls 1of the body member 1 and is provided with a rack 22 upon its outer facefor engaging with the tooth 10 on the pawl 8 as later described. Thespace included between the walls f is of suflicient height to permit therear portion of the shank 21 to have its rack 22 disengaged from thetooth 10 on the under face of the pawl 8 while the other end of the sameincluded between said walls will be held to a substantially firmposition as shown in Figs. 1 and 2.

The use and operation of my improved monkey wrench are as follows :-Thewrench is grasped by the handle portion 3 and the thumb pressed againstone of the trunnions or operating arms 16 of the locking dog 13 so as todraw this member downward from its engagement with the bottom face ofthe shank 21 of the sliding jaw 20. This movement allows the tooth 10 onthe under face of the pawl 8 to become disengaged from the rack 22whereupon the said bar may be pushed to any desired position in the jaws2 and 20 and when this'is done the thumb is removed from the member 16and the spring 18 raises the locking dog 13 to its original position inorder to again engage the tooth 10 with the desired tooth on'the rack 22thereby locking the same and preventing any further movement of thesliding aw 20.

It will thus be seen that my improved wrench-will be quick operating andeiTective and as the parts may all be drop-forged, the machine work willbe reduced to a minimum sothat the cost of the wrench will beconsiderably lower than the present cost ofless eflicient wrenches.

Various modifications and changes in the design and construction of myimproved wrench may be resorted to without departing from the spirit oftheinvention-or sacrificing any of its advantages.

What I claim as my invention and desire to secure by Letters Patentis 1. A wrench including a body member, a fixed jaw formed on the bodymember, a pawl carried by the fixed jaw, a movable jaw having itsshank'disposed for sliding movement through the fixed-jaw and-providedwith rack teeth engageable with the pawl, and a spring pressed lockingdog pivotally mounted in the body member and a locking means formed onthe dog, said means being normally held in locking engagement with theshank of the movable jaw for maintaining the shank in spaced relation tothe body member and in looking engagement with the pawl, said lockingmeans being supported upon the face of thebody member when in operativeposition.

2. Awrench of the character described including a body member,a fixedjaw car- Iied by thebody member, a movable jaw 'slidable through thefixed jaw, a fixed pawl adapted to engage with the movable jaw formaintaining the same in engagement with the pawl, and a lateral trunnioncarried by the locking dog, said trunnion being engageable with the bodymember for limiting the swinging movement of the dog and constituting afinger grip by which the dog may be manipulated.

3. A wrench of the character described including a body member, a fixedjaw formed thereon, a pair of parallel spaced flanges formed on onelongitudinal face of the body member, a movable jaw slidable withrespect to the fixed jaw, a pawl carried by the fixed jaw and engageablewith the shank of the movable jaw for maintaining the movable jaw inadjusted position, a locking dog pivotally mounted between the saidfianges,a leaf spring engaging the dog for normally maintaining the dogin engagement with the shank of the movable aw for urging the same intolocking engagement with the pawl, and lateral trunnions formed on theouter terminal of the locking dog, said trunnions constituting fingergrips for manipulating the dog and being engageable with thelongitudinal face of the body memher for limiting the movement of thedog in both active and inactive positions.

In testimony whereof, I, the said ALBERT KLEIN, have hereunto set myhand.

ALBERT KLEIN.

Witnesses:

T. B. HUMPHRIES,

J. N. CooKE.

Copies of this patent may be obtained for five cents each, byaddressingthe Commissioner of Patents,

' Washington, D. G."

